I'm struggling with something I'm sure is quite simple, I hope someone can help!
I have a column in my data set (survey responses from qualtrics) which is numeric data for the duration taken to complete survey in seconds. I want to filter out participants who responded exeptionally fast so I can look at their responses. I am hoping to find any participants whose response is equal to or less than 3SD from the mean.. I cannot figure out how to do this. I have foud the mean reponse time, and SD, but don't know how to specifically select those with fast responses.
Any help with syntax for this wold be greatly appreciated!